Chemical shift and intensity ratio values of dyspersium, holmium and erbium L X-ray emission lines

A systematic study of L X-ray spectrum has been made on the elements Dy, Ho and Er in the pure form elements and compounds to look into the influence of chemical effect. The vacancies were created by 59.54 keV γ-rays from an 241Am radioactive source. The L X-ray emission spectra of heavy elements taken with the currently available Si(Li) detectors show four or five distinct peaks. Corrections for sample absorption and spectrometer efficiency were applied to the measured relative intensities. The results show agreement with the theoretical predictions of Scofield ( Scofield, 1974a).

► Changes in chemical environment effects intensity ratio and line parameters.
► Electronic structure change with this effect.
► There is correlation between the intensity ratio changes with crystal symmetry and the effective numbers of 4f electrons.